Bumper jack



C. E. BRANICK Feb. 16, 1954 BUMPER JACK Filed July l0, 1952 INVENToR.CHARLES l'. .Ema/cl( BYWWMVM! rroR/VEYS Patented Feb. 16, 1954 UNITEDSTATES iiTENT OFFICE BUMPER JACK;

Char1es.E..Branick, Fargo, N..Dak.

Application July 10, 1952SeriaIN'o. 298,019

(01;. Z54L-Z)S 1 Claim.

My invention relates to fluid pressure lifting jacks, and moreparticularly to bumper jacks for lifting automotive vehicles, and is inthe nature of an improvement of the structure disclosed and broadlyclaimed in my co-pending application filed December 13, i951, S. N.261,499, entitled Bumper Jack.

The primary object of my present invention is the provision of a bumperjack for automotive vehicles of the type above described which isprovided with means for varying the lateral spac ing between the pair ofbumper engaging lifting elements, herein referred to as lifting headsand identied as lifting arms in my above identified Referring to thedrawings wherein like charactors indicate like parts throughout theseveral v1ews:

Fig. l is a view in side elevation of my novel structure;

Fig. 2 is a view in front elevati-on; and

Fig. 3 is a fragmentary detail in plan of the lifting beam and one ofthe lifting heads carried thereby.

Referring with greater particularity to the drawings, the numeral Iindicates a mounting base having mounted thereon a pair of laterallyspaced wheels 2, upstancling pressure cylinder 3, having a detachablehead 5i at its upper end, and elongated external track surfaces 5 and son the forward and rearward sides respectively of the cylinder 3.Mounted within the cylinder 3 for reciprocal movements is a piston, notshown, having a plunger rod I working through an opening in the head Across head il having an inverted U-shaped handle e projecting upwardlytherefrom is rigidly carried by the upper end of plunger rod 1.

A pair of lifting links Iii have their upper ends rigidly secured to thecross head by means of headed bolts iI, whereas the lower ends thereof1' are connected by an axle I2 upon which are journalled a pair ofrollers i3. Rollers I3 are adapted to ride one each on the track 5 whenvertical movements are imparted to the piston, the plunger rod 'I andthe cross head Also rigidly secured oneach to' the lowerv end portionsof the lifting links Ill and projecting rearwardly therefrom, preferablyat right angles thereto, are a pair of guide rods I4, each Of whichcarry opposed rollers I5, one each of which rides upon a rail 6.

All parts heretofore described, as well as the rearwardly projectinghandle I6 the thrust roller Il, are identical to the parts described inmy above identified cti-pending application, S. N. 261,499.

.A lifting beam, identified in its entirety by the numeral Iii, is shownas being rigidly secured, by welding or the like i9, to the forwardlyprojected edges 2t of the lower end portions of the lifting links I s inoverlying relationship to the roller I3. Lifting beam I8 includes atubular intermediate section 2I, preferably and as shown being generallyrectangular in shape, and end sections 22 adjustably slidably mountedwithin the tubular intermediate section 2l. Also preferably and asshown, the adjustable end sections 22 are rectanguiar in cross sectionand are slidably received within the section 2| in side by siderelationship, see Fig. 3. It is to be noted that the intermediatesection 2I has considerable length so as to provide an adequate bearingsurface for the adjustable sections 22. Lifting heads 23 on the extremeouter ends of beam sections 22, preferably and as shown are yoke-like incross section, so as to nestingly receive the bumper of an automotivevehicle, not shown, or other horizontally disposed bar-like memberthereof. It will be noted that lateral adjustability of the liftingheads 23 so as to engage the bumper, or other portion of the vehicle inthe desired spot and at a proper width for stability during the liftingmovements of the jack, Ina-y be readily accomplished without excessstrain upon the end sections 22 and without materially reducing thebearing surfaces between said end sections 22 and the tubularintermediate section 2|.

While l have shown and described a commercial embodiment of myinvention, it should be obvious that same is capable of modificationwithout departure from the scope of the present invention as defined bythe appended claim.

What I claim is:

In a portable nuid pressure jack, a mounting base, an elongatedvertically disposed pressure cylinder on said base, guide means at theopposite sides of the longitudinal axis of said cylinder providingsurfaces parallel to the longitudinal axis thereof, a fluid pressureoperated plston within said cylinder, a. plunger rod carried by saidpiston and projecting upwardly through the upper end of said cylinder, across-head rigidly connected to the `outer projecting portion of saidplunger rod and extending laterally outwardly therefrom in the verticalplane common to said guide means and longitudinal axis of the cylinderand terminating adjacent one end of said guide means, said rod andcross-head moving upwardly in said vertical plane upon actuation of saidpiston by said iuid pressure, a load lifting structure including liftinglinks connected to said cross-head and depending therefrom to pointsadjacent the opposite ends of said guides, an extensible and retractibleload lifting beam connecting the lower ends of said links together,anti-friction means carried by said links and engaging said guidesadjacent said load lifting beam, said load lifting beam extendingforward of theeylinder and horizontally disposed in relation to saidlongitudinal axis thereof, said beam comprising a rigid intermediatesection. projecting laterally outwardly beyond said guides, adjustableend sections of polygonal cross-section configuration slidably mountedfor relative longitudinal movements on said rigid section, and liftingheads carried by the outer end portions of said end sections.

CHARLES E. BRANICK.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 854,381 Rawlinson May 21, 1907 1,214,378 Sadlock Jan. 30, 19171,964,119 Hendry June 26, 1934 2,490,233 Schildmeier Dec. 6, 19492,555,808 Murray June 5, 1951 2,558,535 Billings June 26, 1951 FOREIGNPATENTS Number Country Date 825,493 Germany Jan. 10, 1952

